TDA7405 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7405' PDF : 56 Pages View PDF
TDA7405
6 STEREODECODER-PART
6.1 Features:
■ no external components necessary
■ PLL with adjustment free, fully integrated VCO
■ automatic pilot dependent MONO/STEREO switching
■ very high suppression of intermodulation and interference
■ programmable Roll-Off compensation
■ dedicated RDS-Softmute
■ Highcut- and Stereoblend-characterisctics programmable in a wide range
■ FM/AMNoiseblanker with several threshold controls
■ Multipath-detector with programmable internal/external influence
■ I2C-bus control of all necessary functions
Table 7. ELECTRICAL CHARACTERISTICS
VS = 9V, deemphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz deviation),
modulation frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
Vin
Rin
Gmin
Gmax
Gstep
SVRR
α
THD
S------N+-----N---
MPX Input Level
Input Resistance
Min. Input Gain
Max. Input Gain
Step Resolution
Supply Voltage Ripple Rejection
Max. Channel Separation
Total Harmonic Distortion
Signal plus Noise to Noise Ratio
Input Gain = 3.5dB
Vripple = 100mV, f = 1kHz
fin=1kHz, mono
A-weighted, S = 2Vrms
0.5 1.25
70
100 130
1.5
3.5
4.5
8.5
11 12.5
1.75 2.5 3.25
55
30
50
0.02 0.3
80
91
Vrms
kΩ
dB
dB
dB
dB
dB
%
dB
MONO/STEREO-SWITCH
VPTHST1 Pilot Threshold Voltage
VPTHST0 Pilot Threshold Voltage
VPTHMO1 Pilot Threshold Voltage
VPTHMO0 Pilot Threshold Voltage
PLL
∆f/f Capture Range
DEEMPHASIS and HIGHCUT
for Stereo, PTH = 1
for Stereo, PTH = 0
for Mono, PTH = 1
for Mono, PTH = 0
10
15
25
mV
15
25
35
mV
7
12
17
mV
10
19
25
mV
0.5
%
23/57
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